James b



(No Model.)

J. B. COLT.

MOUNTING FOB OHROMATROPES. No. 430.113. Patented June 17, 1890.

1mm IIIIII "muun A TTOR/VEY UNITED STATES PATENT OFFICEQ JAMES B. COLT, OF NE? YORK, N. Y.

MOUNTING FOR CHROMATROPES.

SPECIFICATION forming part of Letters Patent No. 430,113, dated June 17, 1890. Application filed September 17, 1889. Serial No. 324,256. (No model.)

T0 whom it may concern:

Be it known that 1, JAMES B. COLT, of the city, county, and State of New York, have invented a certain new and useful Improvement in Mountings for Ohromatropes, of which I declare the following to be a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

This invention relates to improvements in mountings for chromatropes and the mechanism by which the same are operated; and the invention consists of the mounting and mechanism for operating chromatropes, constructed and applied substantially in the manner herein described and claimed.

In the accompanying sheet of drawings, Figure 1 is a plan view of a chromatrope mounted as herein described, a portion of one of the faces being broken away to expose the mechanism. Fig. 2 is a longitudinal section in the plane w 00, Fig. 1. Fig. 3 is an edge view of one of the frames which contain the glass plates or disks.

Similar letters of reference indicate like parts in the several views.

By this invention a simple and cheap mounting is provided for a chromatrope or other contrivance wherein it is desired to rotate either a single disk or two disks, one in an opposite direction from the other, about an axis.

The following is a description of the invention in detail:

A on the sheet of drawings designates a block of wood of suitable dimensions, through which a large circular opening is cut, and in this opening is snugly fitted and secured a brass ring B. One edge of this ring is turned outward, and a flange a is formed, which rests against the face of the block, while the opposite edge is turned inward to form the section I), which projects into the opening in a plane substantially at right angles to its axis. A shaft 0, to which is attached a crank d, extends from one end of the block through the wood to the side of the opening, and upon the end of the shaft is secured a small gear e, which projects beyond the inner surface of the ring B. This gear is formed from a flat star-shaped blank, the points or fingers of the blank being drawn up at right angles to the central portion, by which the gear is fastt-ened to the shaft. A coil-spring f tends to draw the shaft outward and keeps the gear 6 in the proper position.

O 0 represent the colored-glass disks of the chromatrope. Each of these disks is mounted in a frame D, which consists of a brass ring, in one edge of which are cut teeth g, designed to engage with those of the gear 6, which teeth and a portion h of the ring adjacent thereto are bent outward and over, so thatthe teeth stand around and away from the body'i of the ring, as represented in the drawings, and the other edge of which ring is turned i11- ward to make a seat for the disk, which is held in place by a ring of wires Z, soldered to the frame around the edge of the disk. The frame should be constructed to pass easily into the ring B and to be capable of freely rotating therein. In depressions in the face of the block are fixed turn-buttons m m m to hold the frames in place in the block.

The frames are inserted in the block, as shown in Fig. 2, with the teeth of one frame facing those of the other and the teeth of both meshing with those of the gear e, and when the turn-buttons are properly set the frames are confined within the ring B between the section thereof in one face of the block and the turn-buttons in the opposite face. By then turning the crank d it is plain that the disks may be caused to rotate in opposite directions and may be reversed by simply reversing the direction of the crank.

The ring B is of great advantage, since it forms a bearing for the frames that always retains substantially its original size and shape, whereas if the wood of the block constituted the bearing, annoyance would sometimes be caused by the failure of the frames to turn freely in consequence of the swelling or warping of the wood.

It is obvious that by constructing one of the frames without teeth it may be caused to remain stationary, While the other frame may be turned freely by the crank in either direction.

Having now described my invent-ion, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of the block A, having a circular opening through the same, the ring B, with the inwardly-turned section b fitted in said opening, a disk-holding frame constructed to turn in the ring as in a bearing, and turn-buttons adapted to secure the frame in the block between the turn-buttons and the section b and to allow the frame to be readily removed from the block, substantially as described.

2. In a chromatrope, the combination of the block A, having a circular opening through the same, a disk-holding frame or ring formed from sheet material and having the inwardlyturned edge 70, the body i, the outwardlyturned portion h, and the teeth g, standing around the body, said frame being adapted to rotate in the circular opening in the block A as in a bearing, and a gear whereby the frame is actuated, substantially as and for. the purpose described.

3. In combination, the block A, having a circular opening or bearing formed therein, the disk-holding frames D D'within the bearing, said frames being made from sheet material and each of them having the inwardlyturned edge is, the body 1', the outwardlyturned portion h, and the teeth g, standing around and away from the body, the gear e, received between the edges of the frames and engaging on one side with the teeth of one frame and on the other side with those of the other, the shaft 0, and the crank d, all constructed and operating substantially as described.

JALWIES B. COLT.

In presence of D. A. CARPENTER, WALTER WARD. 

